A large crucifix is suspended from the ceiling above the altar and in front of the chancel mural. They are located in 12 triangular niches that bisect the A-frame. The stained glass windows, which depict the Stations of the Cross, are by her sister Isabel Piczek. She also created the mural on the rear chancel wall, which is titled The Final Beginning. It represents the Guardian Angel with three figures: Penance, Prayer and Peace. There is a large mosaic over the main entrance of the cathedral by Los Angeles artist Edith Piczek. At its base is a statue of the Holy Family. A four-sided spire capped with a cross is located to the front left of the cathedral. Williams used an A-frame design for the church structure. The cathedral was renovated for $1.3 million in 1995. Guardian Angel retained its status as a cathedral. The diocese was divided in 1995 and the Diocese of Las Vegas was established.

In 1977 Bishop Norman McFarland of the recently re-designated Diocese of Reno-Las Vegas chose the shrine as the co-cathedral. Guardian Angel Shrine was opened on October 2, 1963.

Williams and approached him to design the new church. Dalitz was familiar with the work of Los Angeles architect Paul R. He donated land near the Desert Inn in 1961. Although Jewish, Dalitz liked the idea of having a church convenient for his casino workers. Richard Crowley, CSV, now churchless, approached Moe Dalitz to donate land on the Las Vegas Strip. The ground proved to be unstable and the church was condemned and torn down six months after it opened. Viator Church was built on the site of the former city dump in 1955. Before the establishment of the Diocese of Las Vegas in 1995, it was a parish of the Diocese of Reno. It is the seat of the Archdiocese of Las Vegas. It is just off the Las Vegas Strip, north of the Encore hotel. Guardian Angel Cathedral is a Catholic cathedral in Winchester, Nevada, United States, in the Las Vegas Valley.

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